US Bridges

Old State RD over I-75 NB

Fair

Otsego County, Michigan · 4.1 MI N of Crawford Col · Structure no. 000000000008673

Built
1961
64 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
397 ft
6 main spans
Daily traffic
500
1988 count
Owner
State
State Highway Agency

About this bridge

Old State RD over I-75 NB is a steel stringer/multi-beam or girder carrying Old State RD over I-75 NB in Otsego County, Michigan. It was built in 1961, so it is 64 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 500 vehicles a day, roughly 2% of them trucks, projected to reach 575 by 2008. The structure is 397 ft (121 m) long and 31 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesOld State RD
CrossesI-75 NB
Location4.1 MI N of Crawford Col
RouteCounty Highway 0
CountyOtsego County
StateMichigan
Coordinates44.91573, -84.68824
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length397 ft (121 m)
Longest span68 ft (20.7 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (1988)
Projected traffic575 by 2008
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Old State RD over I-75 NB built?

It was built in 1961, making it 64 years old in 2025.

What condition is Old State RD over I-75 NB in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Old State RD over I-75 NB carry?

About 500 vehicles per day (1988 count), of which roughly 2% are trucks.

How long is Old State RD over I-75 NB?

The structure is 397 ft (121 m) long with a longest span of 68 ft (20.7 m) and a deck 31 ft wide.

Who owns Old State RD over I-75 NB?

It is owned by the State Highway Agency.